J. Crew Men's Regular Fit Flex Long-Sleeve Button Down, Multiple Sizes and Colors

Cotton and Elastane Blend for flex feel and all day comfort. Machine Washable.
Standard fit, with more room through the sleeves and body.
Button down front and button down collar.
Long sleeves, easily cuffed.
Lightweight, great for wearing on its own paired with jeans, chino shorts or chino pants or layered under a jacket or sweater to the office.